- Mar 7 Carl Schwencke, German pianist and composer, born in Hamburg, Holy Roman Empire (now Germany) (d. 1870)
Wilhelm I (1797-1888)
Mar 22 King of Prussia (1861-88) and the 1st German Emperor (1871-88), born in Berlin, Kingdom of Prussia, Holy Roman Empire
- Mar 24 Antonio Rosmini-Serbati, Italian philosopher and priest (founder Institute of Charity), born in Rovereto, Austro-Hungarian Empire (d. 1855)
- Mar 25 John Winebrenner, American clergyman (founded Church of God General Conference), born in Walkersville, Maryland (d. 1860)
- Mar 27 Alfred Victor, Comte de Vigny, French musketeer and writer (Moise, Chatterton), born in Loches, France (d. 1863)